Kelly day
n.— «Kelly days: This term refers to one shift off with pay every 14th shift for all employees who work 24-hour shifts. Northwest firefighters work a 24-hour shift, followed by 48 hours off.» —“Firefighters’ union, county begin talks on district contract” by Charlotte Sutton in Brooksville St. Petersburg Times (Florida) Aug. 28, 1987. (source: Double-Tongued Dictionary)